This Compact 8-ring Riser Mount raises your line of sight by 1/2" without adding extra weight to your firearm. Great for use with red dot sights on flat top ARs. Attaches to any flat top Picatinny rail in a matter of seconds with two large thumb screws. The 8 ring slots allow you to adjust for the most preferred sight placement. It's constructed of aluminum alloy 6061 for strength and durability and it's finished in anodized matte black.